What’s Vulnerable › Vulnerabilities
CVE-2025-67478: Wrong E-Mail address composition for usernames with a comma and Umlauts in it like "Döe, Jähn"
- Severity: high (CVSS 8.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-02-03 · updated 2026-06-17
Description
Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files includes/Mail/UserMailer.Php. This issue affects CheckUser: from * before 1.39.14, 1.43.4, 1.44.1.
Affected products
- Wikimedia Foundation CheckUser: from 1.39.0 before 1.39.14; from 1.43.0 before 1.43.4; 1.44.0 — fixed in 1.39.14, 1.43.4
How to fix
Upgrade to a fixed version: Wikimedia Foundation CheckUser 1.39.14, 1.43.4. Check the vendor advisory for mitigations.
References
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